EP0895303B1 - Système d'antennes directionnelles à polarisation croisée - Google Patents
Système d'antennes directionnelles à polarisation croisée Download PDFInfo
- Publication number
- EP0895303B1 EP0895303B1 EP98401746A EP98401746A EP0895303B1 EP 0895303 B1 EP0895303 B1 EP 0895303B1 EP 98401746 A EP98401746 A EP 98401746A EP 98401746 A EP98401746 A EP 98401746A EP 0895303 B1 EP0895303 B1 EP 0895303B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- conductor elements
- elements
- dipoles
- dipole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/108—Combination of a dipole with a plane reflecting surface
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
- H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/44—Resonant antennas with a plurality of divergent straight elements, e.g. V-dipole, X-antenna; with a plurality of elements having mutually inclined substantially straight portions
Definitions
- the present invention relates to an antenna system directional cross-polarization, intended in particular cell phone.
- EP-A-0 730 319 discloses a system directional antennas, having a plane reflector and an antenna array carried by this reflector.
- Each of the antennas is a dipole defined by two conductive elements rights, which are mounted on two supports for their fixation to the reflector and are connected to the + and - terminals of a source Power.
- the antennas of the network are aligned according to one of the axes of the reflector. They are simple polarization in the network.
- US-A-5,030,962 discloses a structure directional antennas with cross polarization, having a high electrical resistivity substrate, particular silicone, a network of antennas formed on the substrate and a dielectric lens associated with the assembly. Each antenna has two dipoles and four diodes interconnecting the dipoles in pairs. The diodes are looped thus connecting the four branches of the two dipoles, two opposite diodes on the loop being polarity opposite to that of the two others.
- WO 97/22159 A1 discloses a system according to preamble of claim 1.
- the passive elements defined by dipoles and active elements such as diodes and any other components associated with dipoles are made by photoengraving techniques multilayer on the substrate.
- the branches of the dipoles each have the shape of a straight and narrow conductive strip, or variant of a triangular conductive plate and are two two opposites, the respective axes of the two dipoles being orthogonal.
- the present invention aims to achieve compact way a directional antenna system to cross polarization, adapted to mobile telephony.
- each cell having at least two first elements drivers mounted upside down and powered by a first external source of energy by forming a first dipole, characterized in that each radiating cell comprises two second conductive elements mounted identically to the first and powered by a second external source of energy by forming a second dipole, and that said conductive elements are elements folded into shape of Ve and mounted orthogonally the second by compared to the first.
- the radiating cell according to the invention comprises two antennas directional 1 and 2, cross-polarized.
- Each of these two antennas constitutes a formed dipole by a pair of V-shaped conductive elements 1A and 1B or 2A and 2B depending on the dipole.
- the two conductive elements of the same dipole are mounted upside down.
- the two conductive elements of one of the two dipoles are orthogonal to those of the other.
- the conductive elements of the dipole 1 are connected to a cable coaxial 3, for their supply by a first source external energy.
- the conductive elements of the dipole 2 are similarly connected to another coaxial cable 4, for their feeding by a second external source of energy, which is independent of the first.
- the polarity of the dipoles are noted + and - respectively in look at the two conductive elements of each of them.
- each conductive element of dipoles has the advantage of minimizing the far-off effect of these orthogonal components that tend to vanish two to two. Comparatively, with respect to dipoles with conductive elements formed by two plates or layers having the shape of a full V, that the distant effect orthogonal components remain important. Indeed in such a dipole, the current lines flare out at near the edges of each full V to come follow these edges and make the orthogonal components no longer in opposition of phase.
- V-shaped conductive elements of both dipoles are preferably plates bent Vee. This realization using plates and not drivers wire type increases bandwidth dipoles.
- the opening of the V of each of the conductive elements is preferably between 20 ° and 80 °. She is advantageously from 40 to 50.degree. impedance optimization of the antennas.
- the orientation of the Vés by ratio to the horizontal or the vertical is chosen so neither of the polarizations 5 and 6 have this horizontal direction, in order to optimize the transmission characteristics of the two dipoles.
- This orientation of the Ves is such that the polarization directions 4 and 5 are at + 45 ° and - 45 ° respectively relative to the vertical.
- V-shaped conductors each comprise the two branches of each Vee but also a leg 9A or 9B transverse to Ve and leaving from the base of it.
- the two branches of the Ve and the leg form a single piece, the leg itself being folded together with the branches.
- each dipole is substantially equal to half the wavelength of the radiated energy.
- the paws such as 9A, or 9B are in turn substantially equal to one quarter of the wavelength and play the role of current baluns giving polarities + and - to the two elements of the same powered dipole. So, the electric power supplied by the connected power source at one of the dipoles is transformed into radio waves radiated by the dipole according to a broadband diagram desired.
- the system of antennas shown includes a network of dual antennas polarization, which are identical to each other and to the cell of Figure 1 and are all designated under the same overall reference 10, this global reference being reported in correspondence in Figures 1 and 2.
- This array of antennas or radiating cells 10 is carried by a rectangular plane reflector 11. It is arranged according to the longitudinal axis of the reflector. It has four cells in the example shown. Each cell is fed by its two cables 3 and 4 connected to the two dipoles of the cell.
- the reflector has a width close to one wavelength of the energy radiated by the antennas.
- the cables 3 of these different cells are connected to a cable main 13 through an energy divider 15 and similarly the cables 4 are connected to another cable main 14 through a second energy divider 16.
- These two main cables 13 and 14 are also connected two coaxial connectors 17 and 18, carried by one of the reflector ends and provided for both sources of energy allocated to the dipoles of the different cells 10.
- each of the cells 10 is fixed on the reflector using a conductive part 19, provided in end of the legs such as 9A and 9B of the two dipoles and she even attached to the reflector.
- This piece 19 is circular in shape and relatively flat. It has four bores in one of its faces, in which are embedded and welded the ends of the four legs such as 9A and 9B and is secured by screws to the reflector.
- Conductive elements in Vé with their paw individual and the fastener 19 are brass.
- another piece of high electrical resistivity 20 by example plastic is advantageously mounted between four conductive elements of the same dipole, to reinforce their solidarity together.
- This piece 20 is also used to the fixing of the two coaxial cables 3 and 4, the central conductor of each is soldered to one of the elements conductors.
- This piece of solidarity is openwork for minimize its influence in the cell concerned 10.
- the cross-polarized antenna system is also provided with at least one metal partition wall such as 21, between the cells or groups of cells of the network.
- the single wall 21 used in the antenna system according to the FIGS. 3 and 4 are provided along the transverse axis of the reflector 11. It is fixed on the reflector, being protruding on this one. It avoids a direct coupling between the radiating elements located on both sides of it.
- this antenna system is also equipped with an air coupling compensator between the dipoles, this indirect coupling resulting for a large part of the coupling between the fields from reflective reflections on the reflector and more particularly on its longitudinal edges provided generally folded and marked 11A and 11B.
- the coupling compensator comprises two sections or brackets 23A, 23B. These angles are mounted on the rectangular plane reflector parallel to the edges longitudinal, and arranged symmetrically on the else of the longitudinal axis along which the four cells are aligned.
- Both angles offer surfaces additional reflective material with respect to the edges, so that the recombination of reflective electric fields by the edges and by the brackets leads to a reduction sensitive coupling between the two polarizations orthogonal antenna system.
- the system of antennas with a bandwidth of 872 MHz to 960 MHz centered around 915 MHz.
- electromagnetic power is sent by a power source on the dipoles 1A - 1B of the four identical cells 10 whose polarization forms a + 45 degree angle with the longitudinal edge 11A.
- the dipoles 2A - 2B cells 10 whose polarization form an angle of -45 degrees with the longitudinal edge 11B detect a power due to coupling, which in the presence of two angles described in the two previous examples, is in the order of a thousandth of the power sent by the source, whereas in the absence of angles, it is the order of one hundredth.
- the two angles thus make it possible to divide by ten the coupling between the two polarizations crossover of the antenna system which goes from 20 decibel (dB) at 30 dB.
- the compensator can understand on each side of the four cells several angles such as those mentioned above or a profile to several edges such as those angles aforementioned.
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Aerials With Secondary Devices (AREA)
- Waveguide Aerials (AREA)
Description
- chaque élément conducteur est constitué par une plaque pliée en Vé ;
- les éléments conducteurs en Vé ont chacun une ouverture comprise entre 20 et 80°, de préférence entre 40 et 50° environ ;
- les éléments conducteurs en Vé présentent une orientation selon un angle différent de zéro par rapport à l'horizontale, pour présenter une direction de polarisation décalée angulairement par rapport à l'horizontale ;
- la direction de polarisation est de + 45° et - 45° environ, pour les éléments conducteurs de l'un et l'autre des dipôles respectivement ;
- chaque élément conducteur présente une patte conductrice, d'une part solidaire de la base du Vé et saillante d'un côté du Vé sur une longueur sensiblement égale au quart de la longueur d'onde rayonnée par le dipôle correspondant et d'autre part fixée sur ledit réflecteur ; avantageusement, il est prévu une pièce conductrice de fixation des pattes des éléments conducteurs d'une même cellule sur le réflecteur, lesdites pattes ayant leurs extrémités encastrées dans ladite pièce de fixation et soudées sur celle-ci ; en outre, il peut être prévu une pièce de solidarisation, en matériau de résistivité électrique élevée, solidarisant entre eux lesdits éléments conducteurs d'une même cellule ;
- un réseau de cellules est monté selon l'axe longitudinal du réflecteur ;
- deux câbles principaux sont d'une part reliés respectivement à deux connecteurs coaxiaux prévus sur l'une des extrémités du réflecteur et affectés auxdites première et deuxième sources, et d'autre part reliés respectivement à deux diviseurs d'énergie eux mêmes reliés respectivement à des premiers et des deuxièmes câbles affectés à l'alimentation des deux dipôles de différentes cellules ;
- le réflecteur porte des profilés montés parallèles à l'axe longitudinal et disposés symétriquement de part et d'autre du réseau de cellules pour former un compensateur de couplage.
- la figure 1 est une vue de face d'une cellule d'antennes directionnelles à double polarisation, selon l'invention,
- la figure 2 est une de côté de la cellule selon la figure 1,
- la figure 3 est une vue de face d'un système à réseau d'antennes selon l'invention,
- la figure 4 est une vue en coupe selon la ligne IV-IV de la figure 3,
- la figure 5 est une vue en coupe simplifiée du réseau d'antennes de la figure 3 montrant deux cornières selon un premier mode de réalisation,
- la figure 6 est une vue en coupe simplifiée du réseau d'antennes de la figure 3 montrant deux cornières selon un deuxième mode de réalisation.
- largeur du réflecteur 250 mm
- hauteur de chaque bord 32 mm
- hauteur de l'arête de chaque cornière 35 mm
- distance de l'arête au bord le plus proche 84 mm
- largeur du réflecteur 300 mm
- hauteur de chaque bord 48 mm
- hauteur de l'arête de chaque cornière 20 mm
- distance de l'arête au bord le plus proche 128 mm
- largeur du replat 37 mm.
Claims (14)
- Système d'antennes directionnelles à polarisation croisée, comportant un réflecteur (11) sensiblement plan et rectangulaire et au moins une cellule rayonnante (10) portée par ledit réflecteur, chaque cellule comportant au moins deux premiers éléments conducteurs (1A, 1B) montés tête-bêche et alimentés par une première source extérieure d'énergie en formant un premier dipôle (1), système dans lequel chaque cellule rayonnante comporte deux deuxièmes éléments conducteurs (2A-2B) montés identiquement aux premiers et alimentés par une deuxième source extérieure d'énergie en formant un deuxième dipole, et lesdits éléments conducteurs (1A-1B, 2A, 2B) sont montés orthogonalement les deuxièmes par rapport aux premiers, caractérisé en ce que lesdits éléments conducteurs (1A-1B, 2A, 2B) sont des éléments pliés en forme de vé.
- Système selon la revendication 1, caractérisé en ce que chaque élément conducteur est constitué par une plaque pliée en Vé.
- Système selon l'une des revendications 1 et 2, caractérisé en ce que lesdits éléments conducteurs (1A-1B, 2A, 2B) en Vé ont chacune une ouverture comprise entre 20 et 80°.
- Système selon la revendication 3, caractérisé en ce que ladite ouverture est choisie comprise entre 40 et 50° environ.
- Système selon l'une des revendications 1 à 4 caractérisé en ce que lesdits éléments conducteurs en Vé présentent une orientation selon un angle différent de zéro par rapport à l'horizontale, pour présenter une direction de polarisation (5, 6) décalée angulairement par rapport à l'horizontale.
- Système selon la revendication 5, caractérisé en ce que la direction de polarisation est de + 45° et - 45° environ, pour les éléments conducteurs de l'un et l'autre des dipôles (1, 2) respectivement.
- Système selon l'une des revendications 1 à 6, caractérisé en ce que chaque élément conducteur présente une patte conductrice (9A, 9B), d'une part solidaire de la base du Vé et saillante d'un côté du Vé sur une longueur sensiblement égale au quart de la longueur d'onde rayonnée par le dipôle correspondant et d'autre part fixée sur ledit réflecteur.
- Système selon la revendication 7, caractérisé en ce qu'il comporte une pièce conductrice (19) de fixation des pattes des éléments conducteurs d'une même cellule (10) sur le réflecteur (11), lesdites pattes ayant leurs extrémités encastrées dans ladite pièce de fixation et soudées sur celle-ci.
- Système selon l'une des revendications 7 et 8, caractérisé en ce qu'il comporte une pièce de solidarisation (20), en matériau de résistivité électrique élevée, solidarisant entre eux lesdits éléments conducteurs (1A-1B, 2A-2B) d'une même cellule.
- Système selon l'une des revendications 1 à 9, caractérisé en ce qu'il comporte un réseau de cellules (10), monté selon l'axe longitudinal du réflecteur.
- Système selon la revendication 11, caractérisé en ce qu'il comporte deux câbles principaux (13, 14) d'une part reliés respectivement à deux connecteurs coaxiaux (17, 18) prévus sur l'une des extrémités du réflecteur et affectés auxdites première et deuxième sources, et d'autre part reliés respectivement à deux diviseurs d'énergie (15, 16) eux mêmes reliés respectivement à des premiers et des deuxièmes câbles (3, 4) affectés à l'alimentation des deux dipôles des différentes cellules (10).
- Système selon la revendication 10 ou 11, caractérisé en ce que le réflecteur (11) comporte deux bords longitudinaux (11A, 11B) et des profilés (23A, 23B) montés parallèlement à l'axe longitudinal et symétriquement de part et d'autre du réseau de cellules (10).
- Système selon la revendication 12, caractérisé en ce que chaque profilé (23A, 23B) comprend une base (24A, 24B) fixée sur le réflecteur (11) et au moins une arête (26A, 26B) pliée d'un angle (∝) inférieur à 180 degrés par rapport à la base.
- Système selon la revendication 13, caractérisé en ce que chaque profilé comprend un replat (28A, 28B) plié par rapport à l'arête et dirigé vers un bord longitudinal (11A, 11B).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9709566A FR2766626B1 (fr) | 1997-07-28 | 1997-07-28 | Systeme d'antennes directionnelles a polarisation croisee |
FR9709566 | 1997-07-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0895303A1 EP0895303A1 (fr) | 1999-02-03 |
EP0895303B1 true EP0895303B1 (fr) | 2005-02-02 |
Family
ID=9509704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98401746A Expired - Lifetime EP0895303B1 (fr) | 1997-07-28 | 1998-07-09 | Système d'antennes directionnelles à polarisation croisée |
Country Status (6)
Country | Link |
---|---|
US (1) | US6025798A (fr) |
EP (1) | EP0895303B1 (fr) |
AT (1) | ATE288624T1 (fr) |
CA (1) | CA2242705C (fr) |
DE (1) | DE69828848T2 (fr) |
FR (1) | FR2766626B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7075498B2 (en) | 2004-05-27 | 2006-07-11 | Kathrein-Werke Kg | Stationary mobile radio antenna |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6205337B1 (en) * | 1998-05-06 | 2001-03-20 | Alcatel Canada Inc. | Use of sectorized polarization diversity as a means of increasing capacity in cellular wireless systems |
KR100269584B1 (ko) * | 1998-07-06 | 2000-10-16 | 구관영 | 쵸크 반사기를 갖는 저 사이드로브 이중 편파 지향성 안테나 |
FR2808128B1 (fr) * | 2000-04-20 | 2002-07-19 | Cit Alcatel | Antenne monolithique a polarisation croisee |
US6747606B2 (en) * | 2002-05-31 | 2004-06-08 | Radio Frequency Systems Inc. | Single or dual polarized molded dipole antenna having integrated feed structure |
EP1667278A1 (fr) * | 2004-11-23 | 2006-06-07 | Alcatel | Antenne pour Station de base à éléments radiateur à double polarisation et à réflecteur profilé |
US20080231528A1 (en) * | 2005-04-25 | 2008-09-25 | Ramon Guixa Arderiu | Cavity Antenna Excited with One or Several Dipoles |
WO2006114455A1 (fr) * | 2005-04-25 | 2006-11-02 | Radiacion Y Microondas, S.A. | Antenne cavite excitee par un ou plusieurs dipoles |
EP2156510B1 (fr) * | 2007-04-05 | 2016-06-08 | Telefonaktiebolaget LM Ericsson (publ) | Regulateur de largeur de faisceau dependant de la polarisation |
WO2008146202A1 (fr) * | 2007-06-01 | 2008-12-04 | Koninklijke Philips Electronics, N.V. | Antennes de sonde à ultrasons sans fil |
BRPI0818071A2 (pt) * | 2007-10-15 | 2015-07-14 | Jaybeam Wireless | Antena de estação base com estrutura de formação de feixe |
FR2923323B1 (fr) * | 2007-11-07 | 2011-04-08 | Alcatel Lucent | Antenne a piege reflechissant |
US8593369B2 (en) * | 2008-11-12 | 2013-11-26 | Navico Holding As | Antenna assembly |
FR2950745B1 (fr) * | 2009-09-30 | 2012-10-19 | Alcatel Lucent | Element rayonnant d'antenne a double polarisation |
US8570233B2 (en) | 2010-09-29 | 2013-10-29 | Laird Technologies, Inc. | Antenna assemblies |
KR101711150B1 (ko) | 2011-01-31 | 2017-03-03 | 주식회사 케이엠더블유 | 이동통신 기지국용 이중편파 안테나 및 이를 이용한 다중대역 안테나 시스템 |
US9966664B2 (en) * | 2012-11-05 | 2018-05-08 | Alcatel-Lucent Shanghai Bell Co., Ltd. | Low band and high band dipole designs for triple band antenna systems and related methods |
TWM485521U (zh) * | 2014-05-09 | 2014-09-01 | Gemtek Technology Co Ltd | 多頻段天線 |
SG10201505215SA (en) * | 2015-06-30 | 2017-01-27 | Matsing Pte Ltd | Dual Polarized Radiator For Lens Antennas |
US11128055B2 (en) * | 2016-06-14 | 2021-09-21 | Communication Components Antenna Inc. | Dual dipole omnidirectional antenna |
WO2020190863A1 (fr) | 2019-03-21 | 2020-09-24 | Commscope Technologies Llc | Antennes de station de base comprenant des ensembles passifs pour améliorer les performances de discrimination par polarisations croisées |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3605102A (en) * | 1970-03-10 | 1971-09-14 | Talmadge F Frye | Directable multiband antenna |
US4062019A (en) * | 1976-04-02 | 1977-12-06 | Rca Corporation | Low cost linear/circularly polarized antenna |
GB8426246D0 (en) * | 1984-10-17 | 1984-11-21 | British Gas Corp | Microwave reflection survey equipment |
GB2170357B (en) * | 1984-12-20 | 1988-07-13 | Marconi Co Ltd | A dipole array |
US5280297A (en) * | 1992-04-06 | 1994-01-18 | General Electric Co. | Active reflectarray antenna for communication satellite frequency re-use |
US5434575A (en) * | 1994-01-28 | 1995-07-18 | California Microwave, Inc. | Phased array antenna system using polarization phase shifting |
US5966102A (en) * | 1995-12-14 | 1999-10-12 | Ems Technologies, Inc. | Dual polarized array antenna with central polarization control |
-
1997
- 1997-07-28 FR FR9709566A patent/FR2766626B1/fr not_active Expired - Fee Related
-
1998
- 1998-07-09 AT AT98401746T patent/ATE288624T1/de not_active IP Right Cessation
- 1998-07-09 DE DE69828848T patent/DE69828848T2/de not_active Expired - Lifetime
- 1998-07-09 EP EP98401746A patent/EP0895303B1/fr not_active Expired - Lifetime
- 1998-07-24 US US09/121,855 patent/US6025798A/en not_active Expired - Lifetime
- 1998-07-27 CA CA002242705A patent/CA2242705C/fr not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7075498B2 (en) | 2004-05-27 | 2006-07-11 | Kathrein-Werke Kg | Stationary mobile radio antenna |
Also Published As
Publication number | Publication date |
---|---|
ATE288624T1 (de) | 2005-02-15 |
EP0895303A1 (fr) | 1999-02-03 |
DE69828848D1 (de) | 2005-03-10 |
FR2766626B1 (fr) | 1999-10-01 |
US6025798A (en) | 2000-02-15 |
CA2242705A1 (fr) | 1999-01-28 |
DE69828848T2 (de) | 2006-04-06 |
CA2242705C (fr) | 2006-05-30 |
FR2766626A1 (fr) | 1999-01-29 |
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